Specialists from Igor’sLAB conducted a large-scale test of 199 Intel Core i9-13900KS processors and were able to get an objective picture of the quality of selection (binning) of Intel processor chips during production and further marking. After reviewing it, it became clear why Intel is charging $699 for this processor, while the regular Core i9-13900K is $599 and the Core i9-13900KF is $574.
All manufactured chips go through binning – a special selection process that checks the performance and quality of the processor, its temperature rise and its ability to work at a given voltage at a given clock frequency. Binning in a chip can disable some cores or cache memory, in which case it will be used in a cheaper model, for example, not the Core i7-13700, but the Core i5-13600. If the test results are good, a Such a chip received an additional K-index, which indicates its ability to overclock, for example, Core i9-13900K.
The Intel Core i9-13900KS processors are specially selected chips with clock speeds up to 6.0 GHz. All have a common feature – they reach a frequency of 6.0 GHz at a voltage of no more than 1.49 V. If the voltage required to reach this frequency is higher, then it is no longer a KS, but simply a Core i9-13900K . It is important to note that the KS variants are only picked from the Core i9-13900K chips and not the Core i9-13900KF as these have integrated graphics. Although the chip for the Core i9-13900KF can technically perform just as well, Intel will not use such a chip for processors with the KS index.
The Silicon Prediction (SP) values shown in the graph above are based on the ASUS algorithm implemented in motherboards with the LGA 1700 socket. The lower the voltage required to reach the desired frequency, the higher the SP value for the processor. In fact, SP reflects the overclocking potential of a given chip. This method greatly simplifies the comparison of processors of the same model series. Of 199 tested Intel i9-13900KS processors, the average SP was 108.1 points. However, the distribution of SP values for productive and power-efficient cores was different, averaging 117.5 and 90.4, respectively.
And this chart shows the distribution of points between the Core i9-13900KF, Core i9-13900K and Core i9-13900KS models, from which we can conclude that Intel clearly did a good job sorting the chips for the Core i9-13900K at the release of the Core i9-13900KS in the future and offers clock speeds of up to 6 GHz out of the box. Of course, for more accurate results it would make more sense to compare the voltage/frequency curves for each processor, but that will take days if not weeks.
Another thing to note is that if you buy a Core i9-13900KF, the chance of getting a chip with a higher SP die is higher than with a regular Core i9-13900K. This is precisely because crystals from the KF version are not used to release a special KS version.